Multi-step reaction with 9 steps
1.1: sodium hydroxide; water / methanol / 2 h / 20 °C
2.1: triethylamine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / N,N-dimethyl-formamide / 2 h / 20 °C
3.1: 2 % platinum on carbon; hydrogen / tetrahydrofuran / 60 h / 20 °C
4.1: CHIRALCEL OD-H / acetonitrile; trifluoroacetic acid / Resolution of racemate
5.1: n-butyllithium / hexane; 1,2-dimethoxyethane / 20 °C
5.2: 1 h / -78 °C
6.1: trifluoroacetic acid; methoxybenzene / 2 h / 20 °C
7.1: dmap; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 15 h / 0 °C
8.1: hydrogenchloride / ethyl acetate / 4 h / 20 °C
9.1: triethylamine; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide / dichloromethane; ethyl acetate / 15 h / 20 °C
With
hydrogenchloride; dmap; n-butyllithium; 2 % platinum on carbon; water; hydrogen; benzotriazol-1-ol; methoxybenzene; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid; sodium hydroxide;
In
tetrahydrofuran; methanol; 1,2-dimethoxyethane; hexane; dichloromethane; ethyl acetate; N,N-dimethyl-formamide; acetonitrile; trifluoroacetic acid;
DOI:10.1016/j.bmc.2013.04.079